Each culture has its own halvah, united only by nameâwhich derives from the Arabic word for âsweetââand the fact that each is a sweetened candy or dessert, often an ancient and beloved recipe. A trip to Israel is not complete without sampling the countryâs halvah.
The amount of vitamin D you get from exposing your bare skin to the sun depends on: 1  The time of day â your skin produces more vitamin D if you expose it during the middle of the day. 2  Where you live â the closer to the equator you live, the easier it is for you to produce vitamin D from sunlight all year round.
Quick Answer. Avoiding direct sunlight and eating a diet containing insufficient amounts of vitamin D can lead to vitamin D deficiency, according to WebMD. Illnesses that damage the ability of the intestine to absorb vitamin D, such as celiac disease, cystic fibrosis and Crohn's disease, can also lead to vitamin D deficiency. Because fat cells extract vitamin D from the blood, people who are obese often have a vitamin D deficiency.